They handle beautifully on the wet, mine do anyway (different dimensions and car).
Edit: the above was for Pov, regarding the R1Rs.
Rob, funny you should ask, a close friend has them on a Miata NBFL and we were discussing it today. For the past 4 years he's been using semislick tyres on the road exclusively, and he also has a great deal of track experience. He said that after a long time, he finally found the perfect tyre on the Kumho's (hard compound).
I'll have more info in about an hour.